The national emergency commission has declared an alert for the central and south Pacific due to heavy rains and flooding.
The Instituto Meteorológico Nacional reported that more rain is on the way, and the Weather Underground, A.M. Costa Rica’s featured weather service, predicts afternoon thunderstorms through Monday.
The emergency commission said that the soil is saturated and that additional rain will run off quickly.
There has been flooding in seven cantons. They are Corredores, Golfito, Osa, Buenos Aires, Quepos, Parrita and Garabito. There is one shelter with 12 persons in Ciudad Neily, the agency said.
In Corredores there are 11 communities with flooding problems. In Golfito there are five.
The Río Térraba in Osa is at flood stage, and there are problems in some communities with drinking water.
The Instituto de Acueductos y Alcantarillados is trucking in supplies.
The Comisión Nacional de Prevención de Riesgos y Atención de Emergencias said it was stocking more potential shelters in case the flooding increases.
The weather institute said that up to two inches of rain might fall overnight in the affected areas.
There also were thunderstorms in the mountains of the Caribbean, the Talamancas and the Central Valley. Fog was predicted.